Can someone please post a pic that has the basic Barry Allen and the basic Wally West side by side? In my mind I'm not seeing what the difference is here (I think this has been discussed in other threads, but I haven't seen a pic yet). Thanks.

Like StrangePlanet said, it's pretty subtle - Barry had wings on the boots, and a solid "lightning belt"; Wally's belt comes to a point. Also Wally's costume has sometimes been colored a bit darker compared to Barry, and Wally also wore the darker metallic red costume with solid white eye lenses in the cowl.

Not quite true. Wally wore Barry's costume until issue 50 where he got his new "metallic" costume with the white lenses. Wally later went back to the "open eye" look while retaining the pointy belt. The only true difference between an original costume Wally and Barry figure would be there eye color(Barry:blue, Wally:green).

yes good point. It would make sense to release the metallic-red costume for Wally's figure. But I have seen certain colorists show Wally's costume as being a bit darker, probably just artistic license.